AutoCodes – Chevrolet – P0B42 Chevrolet

P0B42 Chevrolet Code - Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage

Quick Answer

The Hybrid/Electric Vehicle battery pack contains 288 cells. Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0B42 Chevrolet indicates Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage.
Common causes: Common causes include Faulty Hybrid/Electric Vehicle Battery Pack, Faulty Hybrid/Electric Vehicle Battery Interface Control Module.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 1,056

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0B42 Chevrolet Description

The Hybrid/Electric Vehicle battery pack contains 288 cells. Groups of three cells are welded together in parallel. There are a total of 96 cell groups in the hybrid/EV battery pack assembly. These cell groups are electrically connected in-series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cells are also grouped together into three sections. The first 90 cells/30 cell groups make up battery section one. This section is adjacent to the cowl and contains batteries 67 through to 96. Battery section two is located behind section one. It is made up of 72 cells/24 cell groups and contains batteries 43 through to 66. The transverse battery section is section number three, it is made up of the remaining 126 cells/42 cell groups and contains batteries 1 through to 42. The three battery sections are individually serviceable components.
The battery energy control module monitors the voltage of the 96 battery cell groups through the four hybrid/EV battery interface control modules. Voltage sense circuits are attached to each individual cell group, and these sense circuits terminate at a connector located on the top surface of the battery section. A serviceable auxiliary battery wiring harness joins this connector to a hybrid/EV battery interface control module, also located on the top surface of the battery section. The hybrid/EV battery interface control module encodes the voltage reading and transmits it to the battery energy control module through the battery control harness. There is one hybrid/EV battery interface control module located on battery sections one and two, and two hybrid/EV battery interface control modules associated with battery section three. The hybrid/EV battery interface control module, battery energy control module wiring harness, auxiliary battery wiring harness, and battery energy control module are all considered serviceable components.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to hybrid/EV powertrain control module 2 through serial data. The hybrid/EV powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P0B42 Chevrolet - Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage - AutoCodes.com — P0B42 Chevrolet Code - Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0B42 Chevrolet?

Faulty Hybrid/Electric Vehicle Battery Pack
Faulty Hybrid/Electric Vehicle Battery Interface Control Module

How to Fix the DTC P0B42 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0B42 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0B42 Chevrolet Code

1. What are the common symptoms of OBDII code P0B42 in a Chevrolet hybrid/electric vehicle?

- Common symptoms include reduced hybrid system performance, decreased fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P0B42 indicating Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage in a Chevrolet?

- Possible causes include a faulty hybrid battery, damaged battery cells, poor battery connections, or issues with the battery management system.

3. How can I diagnose the underlying issue causing OBDII code P0B42 in my Chevrolet hybrid/electric vehicle?

- Diagnose the issue by performing a comprehensive scan with a professional OBDII scanner to identify the specific fault within the hybrid/electric battery system.

4. Can I drive my Chevrolet vehicle with OBDII code P0B42 present?

- It is recommended to avoid driving the vehicle with this code present to prevent further damage to the hybrid/electric system. Seek professional help to diagnose and repair the issue promptly.

5. What repair steps can be taken to address OBDII code P0B42 in a Chevrolet hybrid/electric vehicle?

- Repair steps may include checking and cleaning battery connections, testing the hybrid battery cells, replacing damaged components, or recalibrating the battery management system.

6. How critical is it to address OBDII code P0B42 indicating Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage in a Chevrolet?

- It is crucial to address this code promptly to prevent potential damage to the hybrid/electric system, ensure optimal vehicle performance, and maintain fuel efficiency.

7. Is it possible to reset OBDII code P0B42 in a Chevrolet hybrid/electric vehicle without addressing the underlying issue?

- While it is possible to clear the code temporarily, it will likely reappear if the root cause is not addressed. It is recommended to diagnose and fix the issue to prevent future occurrences.

8. Can a DIY enthusiast with automotive knowledge repair OBDII code P0B42 in a Chevrolet hybrid/electric vehicle?

- While some basic troubleshooting and maintenance tasks can be performed by a skilled DIY enthusiast, addressing complex issues related to the hybrid/electric system may require professional expertise.

9. Are there any preventive measures to reduce the likelihood of encountering OBDII code P0B42 in a Chevrolet hybrid/electric vehicle?

- Regularly inspecting and maintaining the hybrid battery system, ensuring proper charging habits, and promptly addressing any warning signs can help prevent the occurrence of this code.

10. How long does it typically take to repair OBDII code P0B42 related to Hybrid/Electric Vehicle Battery 2 Circuit Low Voltage in a Chevrolet?

- The repair time can vary depending on the specific issue, availability of parts, and the expertise of the technician. It is advisable to consult with a professional for an accurate estimate.